I assert the expense of college is an awful burden to put on someone who must finance most of it through debt. It's a gamble. You can improve your odds of a happy outcome in that gamble by looking at the Student Loan Default Rate for any given major at any given college, and picking the best program for you (with the lowest default rate possible.) But if you are a child of parents who can finance your college? Absolu…
There are few problems, but they're minor compared to the American model imo.
As for people who don't get accepted, in a closed and healthy economy, there's literally never a shortage of jobs (at least pre-AI). There's always something that needs to be done and you can create training programs or job placements for it. Also there are many "technical schools" which offer sorter degrees or professional training.
With AI, jobs will eventually diminish, but UBI has many caveats, the most important being that it leaves (ex?)workers powerless. In order for them to maintain the right to basic income they need some kind of leverage to enforce it. My opinions is that if they don't own the machines that produce they won't manage to do it.
So far the only reason they weren't slaves (or dead) was that they could leverage the need for their labor. Now that it diminishes, they're left with nothing.